Rotatable spindle and bobbin.



PATENTED JUNE 16, 1908.

0. A. SMITH.

ROTATABLE SPINDLB AND BOBBIN.

APPLICATION FILED AUG 27 1907 i 4.0 6 E Q lllumllllhu H i the bobbin,

'45 the bobbin being.

OHOPEDALE, MASSACHUSETTS,

I .No;.890,881.

HOp edale, in the "I'm rovement in To (in it may Be it known-that I,

citizen of the United States,

.RO'IATABLE-SPINDLE AND 30:51am;

. s ecification-6f Letters Patent. Application filed. August 27,1907.Serial No. 390,310.

concern:

CHARLES A. SMITH, a and ares ident of ounty of Worcester "and StateoiMa'ssachusetts, have invented an Rotatable Spindles and Bo bins, 'ofwhich the following description,

- connection with of' the type is aspecification,

1 0 ing representing like parts. 'Thisinvention relates wherein theaccompanying drawlike letterson the drawto rotatable spindles the bobbinis engaged and driven with. the spindle by or through. the mediumofcentrifugally-acting clutching means, comprehending members rotated byand with the spindle and loosely connecte therewith,'to be caused bycentrifugal force. to'firmly engage the; bobbin and thereby efiectlits"rotation in unison with the. spindle.

In practice there 1s alt-times a tendency of thebobbin to swing or movelaterally-,,out' oftrue, particularly at the lowerv or butt end,

notwithstanding fthe' centritugallyacting clutching members. '25 Suchmovement of driving engagement of the bobbin gives rise toundesirable'vibrations and tends -to improp- --erly aiiect the'operationof the apparatus, and various arrangements have been devised to overcomesuch less success. My present mven I roduction of simpleower end or buttof" a objection,,with more or tion hasfo'rits object the means wherebythe bobbin is effectually steadied when-placed on a rotatable spindleprovided with -centrifugally-acting clutching -means, the constructionand arrangement being such that the butt of the bobbin has no lateralmovement relative to the spindle, and

hence the objectio 40 out are completely In accordance with my presentinvention I provide a steadying portion located 'below with relation tothe spindle, bored to provide a part adto receive the steadylng p0r.,

means and fixed jacent its butt 'tion with a snug. but nonnshereinbefore pointed overcome.

for the butt of the' clutching driving fit, and the Y bore above suchpart is-ota different diameter, to receive and be engaged bythecentrifugally-actingclutching means on thespindle. By suchconstruction the proper action of the clutching means is in no wayinter- I iered with nor are the many advantageous l space Fig.

- loosely surroundin A CORPORATION OF. MAINE.

Y Patented. June 1c, 1908.

diminished, while a the bobbin at'its lower end is steadied andmaintained true-and concentric to the axis of .rotation of the spindle.

The novel features of my invention will be fully described in thesubjoined specification an particularly pointed outin thefollowing'claims.

Fi ure 1 is'a-side elevation spin le I of the. centrifugally-acting tpe, with the bobbin thereon in section, 'lustrating one embodinent'invention, the blade of the-s barrel of the bobbin being bro en out'tosave 2 is a detail artly in section and :"partly in elevation, to s owthe' construction of the parts on the spindle; Fig. 3 is a verticalsection of the lower portion of the bob.- bin, showing the bore thereofhavin adjacent portions of difierent diameters; I i 4' is a horizontalsection on the line di l, ig. 1, looking down upon the clutching meansand adjacent parts on the spindle. The spindle 1, whirl 2 having an uturned sleeve 3-'by whi h it is attached to t e spindle,' the enlargedcircular head 4 at the upper end of the sleeve andforming a verticalrest or support for the bobbin B, and the transy segmental .clutchinmembers 5 the spin e, maybe and are all substantial y as: in variousforms of spindles of thecentrifugally acting type now in use.

. verse of my present indle and the) MASSACHUSETTS,nSSIGNO R T0nRAPnR'coMPANY, or I of a rotatable clutch As-shown. herein theclutching members i I are shaped externallyin usual manner and are looseat their upper ends, and herein I have shown their lower ends asentering an annular groove or recess- 6 formed in the upper end or topof a cylindrical enlargement 7 extended upward from the bobbin-rest 4.

Retaining pins in the lower ends of the members '5, one for each member,to positively connect them 8 are passed through holes. v

with the spindle to rotate therewith and also to prevent their removal,the pins permitting the re uisite radial movement of the upper ends'othe clutching members due tocentrif- .ugal action when the spindle isrotated,

while the outer wall of the recess 6 limits such movement.

The enlargement 7 at the lower ends of the *clutchingmeans is fixed withrelation to the spindle, as willbe manifest, and it serves. as a' firmlateral and steadyin device for the lower, end or butt of'the bob in, aswill be explained." j

"Referring tofFigsl l and? it Wi l be seen' thatjthe diameter of thepart7 ,is somewhat members. v

The bobbin B is counterbored a't'its'butt end to present a cylindricalpart ,b at the .mouth of the bore, immediately adjacent the butt, and asecond cylindrical part b above the part but'of less diameter, and alsoof greater length asherein shown, Figs. 1 and 3. The part b formsaninternal chamber to receive the clutching means of'the spindle, the

, clutch members 5 being forced outward by centrifugal action toengage-the walls of the chamber 1) and by such driving engagement therotation of the bobbin in unison with the spindle'is effected. The partb of the'bore of the bobbin is of such diameter that itsli s onto theenlargement 7 with a 'steadying t,

' that is, withno appreciable play but with asmooth and relatively snugfit, but in no sense a driving engagement.

As a result of the above construction the butt of the bobbin hasnolateral movement relatively to the spindle and runs perfectly true withrelation thereto, while the driving effected by the clutching Ineans,'-as will be obvious.

. When the bobbin isapplied to hes indle the expanded upper portions ofte-c utching members are somewhat compres'se'd or pushed inward as theyenter the smaller {part or chamber bf of the bore, to insure a firmdriving engagement therewith."

By reference to Figs. land 3-, it will be seen that the barrel of thebobbin adjacent the butt is of relatively small diameter, such form-ofbobbin having been devised more articularly for 'use in so-called-.feeler ooms, it being desirable to make of small diameter, the part ofthe-barrel on which the bobbin when used with centrifuga yarniswound'with which the ieeler cooperates. Such bobbins at-best have athin Wallat the junction of the barrel with the butt, and in order tomaintain the 'stren th 'ofthe ly-acting clutching means, it isabsolutely necessary that such means operate within a chamber or openingof the smallest possible diameter. For that reason the part b of theboreis ,made of considerably smaller diameter than the part b, for if thediameter of such part b j should be continued up the full length of thebore in the bobbin-butt it would so weaken the bobbin at the 'unction ofthe barrel with the butt that'a re atively sli ht blow would break thebobbin. This wil be clear from an inspection ofeither' Fig; 1 or Fig. 3of the drawing. Such a uniformly large herein the butt has been found inpractlce impracticable and has been given up for the reasons above setforth. The lower end of the bore asp the butt must-be of larger diameterthan theupper part or chamber 6 because j v I thepart I) must receivethe'steadying ortion greater than the diameter, ofjfthe' bobbinengagingor clutching surfaceof thelclutch the enlargement must be made largeenough to loosely surround the lowerends ofthe clutch members 5. It isof great importance, therefore, that the lower chamberin the bobbinbutt, i. a, the one adjacent its outer end, shallbe ofrelatively largediameter and it is of. equal importance that the upper chamber-be of assmall diameter as will receive the clutching means, on account of thenecessity to maintain as much material as possible in the bobbin at thejunction of the barrel with the butt. i The counterboringof the bobbinto provide the two adjacent portions of different .diameters'is veryeasily'effected, and the steadyingv device on the spindle at the sametime aflords a. convenient means for vertically sup orting and laterallyconfining-the lower end of the clutch members. f

Havingdescribed my invention, what I :claim as new and desireto secureby Letters Patent is r 1. The combination, with a rotatablespindle-provided with centrifugally-acting clutch ingmembers to drivethebobbin, a cylindrical enlargement fixedly said members, and ositiveconnections betweenthe lower en s of, said members'andthe enlargement,effecting their rotationf oo mounted below l with the spindle whilepermitting limited 'ra 7 dial movement, of a bobbin having its buttboredtojreceive said enlargement with a steadying fit and providedwithan internal chamber of less diameter to receive and be enga ed .bythe up er ends of the clutching mem ers to drive t e bobbin.

2. The combination, with a rotatable spin- 'dle provided withcentrifugally acting,

transversely segmental clutching members surrounding. the spindle andadapted to internally engage and drive the bobbin, a cylin- 1 dricalenlargement fixed on the spindle and rovided With an annular recess to.receive oosely the lower ends ofsaid members and radial ins looselyconnecting the lower ends of said ameter to receive said enlargementwith a steadying fit and reducedin' diameter above to receive and beengaged bythe clutching v3. .The combination, with a otatable spin dleprovided with centrifugally-acting and transversely segmental bobbinclutching members, a cylindrical enlargement fixed on the spindle andhaving an annular recess to loose y receive the lower endsof said memimembers and said enlargement, of a bobbin having its bore at the. buttofa di-- bers, and connections between the lower lar recess acting uponthe clutching members ends of said members and the enlargement, to limitoutward radial movement thereof of a bobbin counterbored at-its butt toprewhen the spindle is running bare.

- sent internal cylindrical portions of different In testimony whereof,I have signed my 5 diameters, the lower portion of larger diamname tothis specification, in the presence of 15 eter receiving the enlargementwith a steadytwo subscribing witnesses. I ing fit and the upper portion,of smaller di- CHARLES A. SMITH. ameter, receiving and being acted uponby the upper ends of the clutching members to 10 drive the bobbin, theouter wall of the. annu- Witnesses:

GEORGE OTIS DRAPER, ERNEST W. W001)

